package vip.xiaonuo.common.config;

import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.annotation.EnableAsync;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;

import java.util.concurrent.Executor;
import java.util.concurrent.ThreadPoolExecutor;

/**
 * @author 墨塵
 * @since 2023/3/6
 */
@EnableAsync
@Configuration
@Slf4j
public class ExecutorConfig {

    private static int corePoolSize;

    private static int maxPoolSize;

    private static int queueCapacity;

    private static  String namePrefix;

    @Value("${async.executor.thread.core_pool_size:200}")
    public void setCorePoolSize(int corePoolSize) {
        ExecutorConfig.corePoolSize = corePoolSize;
    }

    @Value("${async.executor.thread.max_pool_size:200}")
    public void setMaxPoolSize(int maxPoolSize) {
        ExecutorConfig.maxPoolSize = maxPoolSize;
    }

    @Value("${async.executor.thread.queue_capacity:9999}")
    public void setQueueCapacity(int queueCapacity) {
        ExecutorConfig.queueCapacity = queueCapacity;
    }

    @Value("${async.executor.thread.name.prefix:async-service-}")
    public void setNamePrefix(String namePrefix) {
        ExecutorConfig.namePrefix = namePrefix;
    }

    @Bean(name = "hxunicornAsyncServiceExecutor")
    public Executor asyncServiceExecutor() {
        log.info("start asyncServiceExecutor");
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        //配置核心线程数
        executor.setCorePoolSize(corePoolSize);
        //配置最大线程数
        executor.setMaxPoolSize(maxPoolSize);
        //配置队列大小
        executor.setQueueCapacity(queueCapacity);
        //配置线程池中的线程的名称前缀
        executor.setThreadNamePrefix(namePrefix);

        // rejection-policy：当pool已经达到max size的时候，如何处理新任务
        // CALLER_RUNS：不在新线程中执行任务，而是有调用者所在的线程来执行
        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
        //执行初始化
        executor.initialize();
        return executor;
    }
}
